Thursday
July 24, 2014

Homework Help: chemistry - exam practice help!!

Posted by Anya on Thursday, December 13, 2012 at 10:44am.

Given the table below predict the numerical value of the standard cell potential for the reaction:
2 Cr(s) + 3 Cu2+(aq) 2 Cr3+(aq) + 3 Cu(s)

Half Reaction E (volts)
(1) Cr3+ + 3 e- Cr E= -0.74
(2) Cr3+ + e- Cr2+ E=-0.41
(3) Cr2O72- + 14 H+ + 6 e- 2 Cr3+ + 7 H2O
E= 1.33
(4) Cu+ + e- Cu E= 0.52
(5) Cu2+ + 2 e- Cu E= 0.34
(6) Cu2+ + e- Cu+ E= 0.16

how do i do this?

options:

a ) -0.4
b) 2.5
c) 1.08
d) 0.417
e) -1.08

(all units are volts)


i tried

E(products) - E(reactants) but it didnt work, i didnt get any of the options. :S

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

ap chemistry - I have a lot of questions actually. it's electrochemistry (which ...
Chemistry - For the following electrochemical cell, what is the correct, ...
ChemISTRY (WEBWORK) - A student measures the potential for cells containing A+B+...
Chemistry - A concentration cell based on the following half reaction at 317 K (...
chemistry - A voltaic cell is contructed in which a copper wire is placed in a 1...
Chemistry - For the following balanced equation: 2 Ag+ (aq) + Cu(s) ---> Cu2...
Chemistry - For the following balanced equation: 2 Ag+ (aq) + Cu(s)--> Cu2+ (...
chemistry - For the following balanced equation: 2 Ag+ (aq) + Cu(s) Cu2+ (aq...
UCI Chemistry Webworks - For the following balanced equation: 2 Ag+ (aq) + Cu(s...
Chemistry - For the following balanced equation: 2 Ag+ (aq) + Cu(s) Cu2+ (aq...

Search
Members